Linksys RE6500 Dual-Band Wireless Range Extender: Improve signal quality and fill in the dead zones in your wireless network with this extender. Plus, an audio jack on the back of the extender lets you plug in your speakers and listen to music from your wireless devices, like smartphones, tablets and computers.
Works great as advertised, we use it to boost our bosses wifi signal from the main building to our house, which is 200 yards from the router, gives us an excellent full strength signal, only giving 4 stars because it cuts out occasionally, but very rarely.